Skip to main content

Table 2 Percentage prevalence of likely asthma, symptoms and risk factors (number of individuals) by smoking category and odds ratios (95% confidence interval) adjusted for gender, ETS and age

From: Smoking, respiratory symptoms and likely asthma in young people: evidence from postal questionnaire surveys in the Wythenshawe Community Asthma Project (WYCAP)

  Current smoker Ex smoker Never smoker Total
Wheeze 44.7 (628/1405) 23.6 (134/568) 20.8 (309/1488) 30.9 (1071/3461)
Adjusted odds ratio (95% CI) 3.00 (2.52 to 3.56) 1.2 (0.95 to 1.52) 1  
Cough 43.9 (620/1411) 28.0 (158/565) 28.6 (426/1488) 34.8 (1071/3464)
Adjusted odds ratio (95% CI) 1.96 (1.66 to 2.30) 0.95 (0.77 to 1.19) 1  
Shortness of breath 14.7 (208/1411) 8.3 (47/566) 8.4 (126/1492) 11.0 (381/3469)
Adjusted odds ratio (95% CI) 1.74 (1.36 to 2.23) 0.94 (0.66 to 1.33) 1  
Chest tightness 28.2 (397/1408) 18.1 (102/565) 15.2 (227/1492) 21.0 (726/3465)
Adjusted odds ratio (95% CI) 2.10 (1.73 to 2.54) 1.24 (0.96 to 1.60) 1  
History of hay fever/eczema 32.5 (460/1414) 35.0 (199/565) 37.2 (556/1493) 35.0 (1215/3476)
Adjusted odds ratio (95% CI) 0.86 (0.74 to 1.02) 0.93 (0.75 to 1.14) 1  
Family history of asthma 61.1 (860/1408) 55.3 314/568) 54.0 (802/1486) 57.1 (1976/3462)
Adjusted odds ratio (95% CI) 1.30 (1.11–1.52) 1.06 (0.87–1.29) 1  
Likely asthma 23.9 (327/1368) 12.7 (71/560) 12.6 (184/1457) 17.2 (582/3385)
Adjusted odds ratio (95% CI) 2.07 (1.68 to 2.54) 1.00 (0.75 to1.35) 1